WA-DOC-019: Refresh deprecation-sweep-results.md with canonical follow-up issues

[kitcommerce]

Summary

Closes #910

Refreshes docs/rails7-migration-patterns/deprecation-sweep-results.md with current canonical follow-up issues/PRs and makes the document accurate as of 2026-03-17.

Changes

• Added Last updated timestamp
• Linked initial sweep to WA-VERIFY-001 / issue WA-VERIFY-001: Deprecation warning sweep on next branch #762 (closed/done)
• Added Follow-up Deprecation Audits section linking:
  • WA-VERIFY-071 / #1043 — Rails 7.0 appraisal baseline (open/in-progress)
  • WA-VERIFY-012 / #819 — Rails 7.1+ deprecation warnings audit (open/blocked)
  • WA-VERIFY-007 / #793 — Rails 7.2 deprecation sweep (open/blocked)
• Added Known Deprecation Categories Addressed section with status for each:
  • WA-RAILS7-008 / #700 — ActiveSupport::Deprecation.new Rails 7.1 API (closed)
  • WA-NEW-009 / #626 — update_attributes in production code (closed)
  • WA-NEW-015 / #659 — update_attributes in controllers (closed)
  • WA-NEW-010 / #627 — BSON Symbol deprecation (closed)
  • WA-RAILS7-004 / #690 — Mongoid 8.x upgrade (open)
  • WA-RAILS7-024 / #755 — ActiveJob queue adapter (closed)
  • WA-NEW-008 / #625 — ActiveModel::Errors API (closed)
  • WA-VERIFY-058 / #1023 — Zeitwerk check script (closed)
• Added Categories With No Follow-up Issue table with explicit rationale for each

Client Impact

None (docs only).

Verification Plan

• Spot-check each linked issue/PR URL — all verified to resolve to real, existing GitHub issues
• Confirm open follow-up issues (WA-VERIFY-071: Capture Rails 7.0 appraisal deprecation warning baseline #1043, WA-VERIFY-012: Rails 7.1+ deprecation warnings audit (snapshot + follow-ups) #819, WA-VERIFY-007: Rails 7.2 deprecation sweep #793, WA-RAILS7-004: Mongoid 8.x upgrade — implement changes from research doc #690) are linked and accurately described
• Confirm closed issues (WA-VERIFY-001: Deprecation warning sweep on next branch #762, WA-RAILS7-008: Update ActiveSupport::Deprecation.new for Rails 7.1+ #700, WA-NEW-009: Replace update_attributes/update_attributes! in production code #626, WA-NEW-015: Replace update_attributes in admin/storefront controllers #659, WA-NEW-010: Eliminate BSON Symbol deprecation warning in test suite #627, WA-RAILS7-024: ActiveJob queue adapter compatibility #755, WA-NEW-008: Update PasswordReset error-copying for Rails 7 ActiveModel::Errors API #625, WA-VERIFY-058: Add repo-root Zeitwerk autoload check script #1023) show Closed/Done status